11.  Complicated things, everywhere, deserve a very special kind of explanation.

12.  Biology is the study of complicated things that give the appearance of having been designed for a purpose.

13.  We wanted to know why we, and all other complicated things, exist.

14.  We began this section by asking what kind of explanation for complicated things would satisfy us.

15.  We concluded that the behaviour of a complicated thing should be explained in terms of interactions between its component parts, considered as successive layers of an orderly hierarchy.

16.  But another kind of question is how the complicated thing came into existence in the first place.

17.  A complicated thing is one whose existence we do not feel inclined to take for granted, because it is too improbable.

18.  Also, a related point, leading thinkers tend to judge politicians by the complicated things they say rather than the more straightforward things they do.

19.  And Albright moved on to more complicated things.

20.  And the longer the bombing continues, the more complicated things will become.